more tracklist rendering optimization

ui/widgets/tracklistrow.go

@@ -466,10 +466,10 @@ func (t *tracklistRowBase) needsUpdate(tm *util.TrackListModel, rowNum int) bool
 }
 
 func (t *tracklistRowBase) doUpdate(tm *util.TrackListModel, rowNum int) {
-	changed := false
+	fullRefresh := false
 	if tm.Selected != t.Selected {
 		t.Selected = tm.Selected
-		changed = true
+		fullRefresh = true
 	}
 
 	// Update info that can change if this row is bound to
@@ -504,7 +504,7 @@ func (t *tracklistRowBase) doUpdate(tm *util.TrackListModel, rowNum int) {
 		t.dateAdded.Text = util.FormatDate(tr.DateAdded)
 		t.path.Text = tr.FilePath
 		t.path.SetToolTip(tr.FilePath)
-		changed = true
+		fullRefresh = true
 	}
 
 	// Update track num if needed
@@ -524,21 +524,20 @@ func (t *tracklistRowBase) doUpdate(tm *util.TrackListModel, rowNum int) {
 		} else {
 			str = strconv.Itoa(rowNum)
 		}
-		t.num.Text = str
-		changed = true
+		t.num.SetText(str)
 	}
 
 	// Update play count if needed
 	if tr.PlayCount != t.playCount {
 		t.playCount = tr.PlayCount
-		t.plays.Text = strconv.Itoa(int(tr.PlayCount))
-		changed = true
+		t.plays.SetText(strconv.Itoa(int(tr.PlayCount)))
 	}
 
 	// Render whether track is playing or not
 	if isPlaying := t.tracklist.nowPlayingID == tr.ID; isPlaying != t.isPlaying {
 		t.isPlaying = isPlaying
 		t.name.Segments[0].(*widget.TextSegment).Style.TextStyle.Bold = isPlaying
+		t.name.Refresh()
 
 		if isPlaying {
 			t.originalNumColContent = t.Content.(*fyne.Container).Objects[0]
@@ -546,14 +545,14 @@ func (t *tracklistRowBase) doUpdate(tm *util.TrackListModel, rowNum int) {
 		} else {
 			t.Content.(*fyne.Container).Objects[0] = t.originalNumColContent
 		}
-		changed = true
+		canvas.Refresh(t)
 	}
 
 	// Update favorite column
 	if tr.Favorite != t.isFavorite {
 		t.isFavorite = tr.Favorite
 		t.favorite.Objects[0].(*FavoriteIcon).Favorite = tr.Favorite
-		changed = true
+		canvas.Refresh(t.favorite)
 	}
 
 	// Update rating column
@@ -566,7 +565,7 @@ func (t *tracklistRowBase) doUpdate(tm *util.TrackListModel, rowNum int) {
 		t.rating.Refresh()
 	}
 
-	if changed {
+	if fullRefresh {
 		tracklistUpdateCounter.Add()
 		t.Refresh()
 	}